CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's Bluetooth management, specifically in the handling of variable-length commands for extended advertising data. An attacker with CAP_NET_ADMIN privileges can exploit this flaw to perform an out-of-bounds read, potentially allowing them to access sensitive data from memory. Organizations using Linux systems with Bluetooth capabilities should prioritize patching this vulnerability to mitigate the risk of data exposure.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate Add Extended Advertising Data length MGMT_OP_ADD_EXT_ADV_DATA is registered as a variable-length command, with MGMT_ADD_EXT_ADV_DATA_SIZE as the fixed header size. The handler then uses cp->adv_data_len and cp->scan_rsp_len to validate and copy cp->data, but it never checks that those bytes are part of the mgmt command payload. A short command can therefore make add_ext_adv_data() pass an out-of-bounds pointer into tlv_data_is_valid(). If the bytes beyond the command buffer are addressable, they can also be copied into the advertising instance as scan response data, where the caller can read them back via MGMT_OP_GET_ADV_INSTANCE. The trigger requires CAP_NET_ADMIN in the initial user namespace; KASAN reports an 8-byte slab-out-of-bounds read. Reject commands whose length does not match the fixed header plus both advertising data lengths before parsing cp->data.
Related CVEs
Other vulnerabilities affecting the same vendor(s)